<script setup lang="ts">
import { ref } from 'vue'
import { onLoad } from '@dcloudio/uni-app'
import { Recommend, SubType, GoodsItemObj } from '@/types/recommend'
import { getRecommend } from '@/api/recommend'

// 统一管理推荐请求
const urlMapList = [
  { type: '1', title: '特惠推荐', url: '/home/preference/mutli' },
  { type: '2', title: '爆款推荐', url: '/home/inVogue/mutli' },
  { type: '3', title: '一站买全', url: '/home/oneStop/mutli' },
  { type: '4', title: '领券中心', url: '/home/new/mutli' }, // 后端未提供，暂用新鲜好物url
  { type: '5', title: '新鲜好物', url: '/home/new/mutli' }
]
let urlMapObj: any
const recommend = ref<Recommend>({} as Recommend)
const subTypes = ref<(SubType & GoodsItemObj)[]>([])
const activeIndex = ref(0)
onLoad(async ({ type }) => {
  urlMapObj = urlMapList.find(item => item.type === type)
  if (urlMapObj) {
    // 动态更新导航栏标题
    uni.setNavigationBarTitle({
      title: urlMapObj.title
    })

    // 发请求，获取数据
    const res = await getRecommend({
      url: urlMapObj.url
    })

    // 整理推荐商品列表数据
    res.subTypes.forEach(item => {
      const goodsItem = res.goodsItems[item.id]

      subTypes.value.push({ ...item, ...goodsItem })
    })

    recommend.value = res
  }
})
// 上拉加载更多
const onScrollToLower = async () => {
  const subType = subTypes.value[activeIndex.value]
  if (urlMapObj) {
    if (subType.counts === subType.items.length) {
      return uni.showToast({
        title: '没有更多数据啦...'
      })
    }

    // 页面++
    subType.page++
    const res = await getRecommend({
      url: urlMapObj.url,
      subType: subType.id,
      page: subType.page
    })

    subType.items.push(...res.goodsItems[subType.id].items)
  }
}
</script>

<template>
  <view class="viewport">
    <!-- 推荐封面图 -->
    <view class="cover">
      <image :src="recommend.bannerPicture"></image>
    </view>
    <view class="tabs">
      <text
        class="text"
        v-for="(item, index) in recommend.subTypes"
        :key="item.id"
        :class="{ active: index === activeIndex }"
        @click="activeIndex = index"
        >{{ item.title }}</text
      >
    </view>
    <scroll-view
      scroll-y
      enhanced
      :show-scrollbar="false"
      class="scroll-view"
      v-for="(item, index) in subTypes"
      v-show="activeIndex === index"
      :key="item.id"
      @scrolltolower="onScrollToLower"
    >
      <view class="goods">
        <navigator
          hover-class="none"
          url="/pages/goods/index"
          class="navigator"
          v-for="goods in item.items"
          :key="goods.id"
        >
          <image class="thumb" :src="goods.picture"></image>
          <view class="name ellipsis">{{ goods.name }}</view>
          <view class="price">
            <text class="symbol">¥</text>
            <text class="number">{{ goods.price }}</text>
          </view>
        </navigator>
      </view>
      <view class="loading">正在加载...</view>
    </scroll-view>
  </view>
</template>

<style>
page {
  height: 100%;
  background-color: #f4f4f4;
}

.viewport {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 180rpx 0 0;
  position: relative;
}

.cover {
  width: 750rpx;
  height: 225rpx;
  border-radius: 0 0 40rpx 40rpx;
  overflow: hidden;

  position: absolute;
  left: 0;
  top: 0;
}

.tabs {
  display: flex;
  justify-content: space-evenly;
  height: 100rpx;
  line-height: 90rpx;
  margin: 0 20rpx;
  font-size: 28rpx;
  border-radius: 10rpx;
  box-shadow: 0 4rpx 5rpx rgba(200, 200, 200, 0.3);
  color: #333;
  background-color: #fff;
  position: relative;
  z-index: 9;
}

.tabs .text {
  margin: 0 20rpx;
  position: relative;
}

.tabs .active::after {
  content: '';
  width: 40rpx;
  height: 4rpx;
  transform: translate(-50%);
  background-color: #27ba9b;
  position: absolute;
  left: 50%;
  bottom: 24rpx;
}

.scroll-view {
  flex: 1;
}

.goods {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  padding: 0 20rpx 20rpx;
}

.goods .navigator {
  width: 345rpx;
  padding: 20rpx;
  margin-top: 20rpx;
  border-radius: 10rpx;
  background-color: #fff;
}

.goods .thumb {
  width: 305rpx;
  height: 305rpx;
}

.goods .name {
  height: 88rpx;
  font-size: 26rpx;
}

.goods .price {
  line-height: 1;
  color: #cf4444;
  font-size: 30rpx;
}

.goods .symbol,
.goods .decimal {
  font-size: 70%;
}
</style>
